#!/usr/bin/env node 
console.log('1234');
const cp=require('child_process');
const son=cp.fork('./11-ipc-child.js');
      doc=cp.fork('./11-ipc-child.js');
son.on('message',(msg)=>{
      console.log(`i have a son with PTD:${msg}`)
})
son.send('work hard');

